If you don't mind voiding your warranty, physically disconnect the BT module. There are "how to" videos on yt.
Had to disconnect the WIFI module on mine (also Samsung) to make the remote work again...
I rent a room and the tenant is on the same WiFi network. They politely messaged me one day saying “I think you’re trying to connect to my TV”. Which as it turns out was our toddler mashing the screen on YouTube Kids. I worked out on YouTube kids how to disable the option in the app.
My point being that it’s not always a rational person you’re dealing with, being able to at least disable the option is essential.
https://gothamist.com/news/park-slope-childrens-salon-trolle...